More than 40 people and search-and-rescue teams from San Bernardino, San Diego, Los Angeles and Riverside counties Monday were looking for Seuk Doo Kim in the rocky terrain north of Upland, authorities said.

The San Bernardino County Sheriff’s Department confirmed that the car of a 78-year-old hiker was found Sunday near the Baldy trailhead, at Manker Flats, but would not reveal the hiker’s name.

David Kim, Seuk Doo Kim’s son, confirmed that the search is for his father.